A random sample of 44 observations is taken from a population with a mean of 1550 and a standard deviation of 106. If the mean of the sample is 1597, find the standard
score (z score) for this observed sample mean.
Group of answer choices
2.66
19.51
2.78
0.44
2.94

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.